Re: [condor-users] Questions about resource allocation and user priorites...

[Dan Bradley <dan@xxxxxxxxxxxx>]

Michael S. Root wrote:

> The thing is, the individual jobs that make up each dag usually only take 
> between 1 and 20 minutes each, but there can be several hundred jobs per 
> dag.  Why don't the second user's jobs acquire resources as the first 
> user's dag's individual "sub-jobs" finish, which they do fairly often?

Currently, there is no way to tell Condor you want preemption of 
resource claims to be considered between job boundaries.  However, you 
_can_ set PREEMPTION_REQUIREMENTS to allow preemption during the first 
few minutes of a job's life, instead of the default expression which is 
to allow preemption after the claim has existed for one hour:

PREEMPTION_REQUIREMENTS =
(MY.JobStart =?= UNDEFINED) || \
(MY.LastHeardFrom - MY.JobStart) < 10 * 60) || \
(MY.LastHeardFrom - MY.JobStart) > 48 * 60 * 60

The above expression will allow preemption during the first 10 minutes 
of a job or after an unreasonably long amount of time (in this case 48 
hours).

We are currently working on a feature that would accomplish this more 
gracefully without interrupting jobs shortly after they have begun.

Dan Bradley, Condor Team


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